18" Series 900 Spiral Balance

Product Code: S900-18

18" Series 900 Spiral Balance
Main product image of the S900-18 18" Series 900 Spiral Balance
Close up of the S900 balance top.
Close up of the S900 balance bottom.
How to replace a tilt window spiral balance.
How to Identify a Replacement Spiral Balance
Quantity Price
1-11 $6.87
12-49 $6.18
50-99 $5.84
100-249 $5.50
250+ $5.15
Please Note: Bulk pricing applies only to purchases of the same option
blue tip blue tip
add $0.20
green tip green tip
add $0.25
red tip red tip
Product Description
This is a Series 900 spiral balance for tilt-in windows. It moderates the operation of your window sash to allow the window to stay open when raised.
  • This balance has a 18" long metal tube. When determining the length only measure the metal tube.
  • The strength you need should be indicated as a color tip at the end of your old metal tube. If you do not see a color tip weigh your sash on a scale and refer to the chart below.
  • The metal tube measures 3/8" in diameter and houses an internal spiral rod with double pins.
  • Can work for either the left or right side of the window interchangeably.
  • Spiral window balances come fully lubricated and ready to be charged.
  • Color Tip Sash Weight Range
    Red 6 to 16 lbs
    Blue 9 to 21 lbs
    Green 14 to 24 lbs
    *This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
Good Idea!
Balances are sold individually, however, it is a good idea to replace both window balances at the same time. Pairing a new balance with an old one would cause the new balance to wear out faster.
Helpful Tip!
You should choose the color tip that matches the color tip of the balances you are replacing. If you do not see the tip color available in 'options' or you are unsure of which color to choose: ask our experts for help.
Customer Questions & Answers
Discussion # Of Replies Last Post Date
Window balancesThis discussion includes image(s). 4 Jun 6, 2019
Replacement of broken shoes for double hung (bottom window) with spiral balanced This discussion includes image(s). 4 Jun 9, 2018
Double Hung WindowsThis discussion includes image(s). 8 Nov 14, 2017
Do I need a custom balance?This discussion includes image(s). 2 Aug 8, 2017
need two 18" (900 series) spiral balance rods with white tips 3 Nov 13, 2015
Locating jamb liner with balance 2 Sep 29, 2010
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